BuildersRiskNerd places builders risk and course of construction policies in all 50 states, from $50K kitchen remodels to $50M apartment builds. Same product. Different scale.
Builders risk insurance, also called course of construction insurance, is a specialized property insurance policy that covers buildings under construction or renovation against physical loss or damage from fire, theft, vandalism, weather, and other named perils. Coverage typically lasts from project start to completion or first occupancy, whichever occurs first.
BuildersRiskNerd is a brand of ContractorNerd Insurance Services, LLC, a licensed insurance producer placing builders risk and course of construction coverage with admitted and non-admitted carriers. This page covers the product end to end: how it works, who buys it, where the names “builders risk” and “course of construction” came from, and how it fits next to general liability and homeowners coverage.
Almost every construction loan in the United States requires builders risk before the first draw. Almost every AIA construction contract assigns it to one party by default. The product has been around for over a century. The questions below are the ones contractors and homeowners ask most often when they encounter it for the first time.
How builders risk insurance works
Builders risk is a temporary property policy that follows a building from groundbreaking through completion. The most common policy form is ISO form CP 00 20, the Builders Risk Coverage Form. It is the industry standard. Carriers adapt it with their own endorsements and exclusions, and some place builders risk under inland marine forms instead, which often allow broader coverage for materials in transit and at off-site storage.
Term length tracks the project. A small kitchen remodel might run 3 to 6 months. A custom home build typically lasts 12 months. Large commercial projects sit on 24 to 36 month terms. Most policies are sold for the expected build duration with the option to extend if the schedule slips. Renewal premiums on those extensions can run higher than the original term, especially when carriers re-underwrite midway through.
The named insureds typically include any party with a financial interest in the property: the property owner, the general contractor, the lender holding the construction loan, and sometimes key subcontractors. Architects and design professionals are usually added as additional insureds, not named insureds, when the construction contract calls for it.
Building valuation is the next mechanic to understand. Most builders risk policies are written on a replacement cost basis, with the limit set to the total completed value of the project, which is the final hard cost of construction excluding land. A few markets offer actual cash value (ACV) policies for older renovation work, though these are uncommon and usually less favorable for the insured.
Trigger events that start coverage live in the policy language. Most policies kick in when materials arrive on site, when ground is broken, or when the construction contract is signed, depending on the carrier’s wording. Coverage ends on the earliest of three events: occupancy of the building for its intended use, expiration of the policy term, or cancellation by the insured. Some carriers offer 30, 60, or 90-day “permission to occupy” endorsements that bridge the gap between substantial completion and the start of a permanent property policy.
Two structural details that contractors miss. First, builders risk and general liability are separate policies. A slip-and-fall on the job site goes through GL. Second, coverage of the contractor’s tools and equipment requires a specific endorsement or, more commonly, a separate inland marine policy. For tools, scaffolding, and contractor-owned equipment, an inland marine policy or contractor’s equipment floater is the right fit. Our what builders risk insurance covers walks through every covered peril and the common exclusions in detail.
Who needs builders risk insurance
Five buyer profiles account for almost every builders risk policy placed in the United States.
General contractors buy builders risk on commercial and residential projects when the construction contract assigns the job to them. The AIA A201 default puts it on the GC in most contract sets. The GC is usually the named insured and adds the owner and lender as additional named insureds.
Property owners buy builders risk when the contract assigns it to them, when they are acting as their own GC, or when they want to control the policy directly because the lender requires specific coverage forms. Owner-procured policies are common on custom homes and on commercial projects where the owner wants to coordinate the builders risk with their permanent property program.
Homeowners building or renovating make up one of the largest buyer groups by volume. A homeowner remodeling a kitchen, building an addition, or renovating a vacant home for resale needs builders risk if the renovation exceeds what their homeowners policy covers, which is most projects above $25,000. The HO-3 form excludes most of the perils that show up during a build. The dwelling-under-construction extension on a homeowners policy rarely covers a meaningful renovation by itself. Our builders risk vs homeowners explained explains the gap in plain English.
Real estate investors and house-flippers buy builders risk on flips and value-add renovations. A vacant home undergoing renovation is one of the toughest builders risk profiles to place because the building is empty, the property is often older, and the work involves multiple trades cycling through. Standard markets often decline these submissions, and the policy lands with a non-admitted carrier.
Lenders requiring it as a loan condition drive a lot of builders risk demand. Almost every construction loan covenant requires builders risk equal to the full project value, with the lender named as a mortgagee or loss payee. A late or non-compliant certificate of insurance can hold up draw schedules. Lenders block draws until the binder shows up. On a 12-month build with monthly draws, even one missed draw can cascade into late fees, contractor payment delays, and a strained loan relationship.
The question of which party in the contract is responsible for buying the policy is its own topic. We cover the contract language and the AIA defaults on our who handles the builders risk policy.
A short history of builders risk insurance
Builders risk has its roots in inland marine insurance, which itself grew out of ocean marine policies in the 1800s as American carriers extended cargo coverage from saltwater shipping to inland waterways and overland transport. By the early 20th century, inland marine carriers were writing “all risk” forms for property in transit and at temporary locations. Materials and partially completed buildings on a job site fit naturally inside that form.
Until the 1930s, most construction-period coverage was placed through inland marine markets under “builders risk” or “course of construction” wordings. The Insurance Services Office (ISO) and its predecessors began standardizing the commercial property forms in the postwar era, and the modern Builders Risk Coverage Form CP 00 20 emerged from that work. Surplus lines markets and Lloyd’s syndicates kept the older “course of construction” terminology, which is why the same product still travels under both names today. The term changed. The product did not.
The shift from named perils to broader open perils coverage took place gradually through the 1960s and 1970s. Most builders risk policies sold today are open perils forms, meaning anything outside the listed exclusions is covered. Named perils policies still exist, mostly for higher-risk profiles like vacant home renovation.
Other names for builders risk insurance
The product is called several things depending on region, market segment, and policy form. Contractors and homeowners often hear two or three of these terms in the same week and assume they describe different products. They describe the same one.
Course of construction insurance is the older inland-marine-derived term, still standard in California regulatory filings, Lloyd’s syndicate forms, and surplus lines markets. The term shows up in lender documents from non-bank construction financiers and on commercial projects above $5M. In California, “course of construction” is the dominant local term and appears in almost every commercial lender’s certificate request. Our California builders risk specifics covers the state-specific terminology, wildfire deductibles, and admitted-versus-surplus-lines split that California contractors should know about.
Builders all risk insurance shows up on commercial open-perils policies, reflecting the “all risk” coverage form rather than the named-perils form. The term is more common in international and reinsurance contexts. American policies usually drop the “all risk” qualifier and just say “builders risk,” but the coverage scope can be identical.
Inland marine builders risk describes the policy when it is placed under inland marine classification rather than commercial property. This shows up when the project involves substantial materials in transit, when the carrier’s appetite skews to inland marine, or when the surplus lines route is the only available market. Inland marine builders risk often allows broader coverage for materials at off-site fabrication locations and during transit to the job site.
COC is the abbreviation. It appears in many lender documents, surplus-lines binders, and commercial real estate contracts. If a lender’s COI request asks for “COC coverage,” they are asking for course of construction. Same product. Different label.
A few quick clarifications come up often enough to address here:
Is course of construction insurance the same as builders risk? Yes. They are two names for the same product. The policy form, the perils covered, and the underwriting line up the same way. Carriers, lenders, and brokers use the names the same way, and a policy labeled “course of construction” satisfies a contract requirement for “builders risk” and the reverse.
Why are there two names? Historical accident. Inland marine carriers wrote the early policies and called them course of construction. Commercial property carriers later wrote competing forms and called them builders risk. Both names stuck because the markets that use them settled on different labels.
Which term should I use when buying? Use whichever term appears in your contract. If the AIA A201 says “builders risk,” ask for builders risk. If the lender’s loan covenant says “course of construction,” ask for course of construction. The carrier will know what you mean either way. BuildersRiskNerd shops both terminology types and matches the policy form to the contract requirement.
How builders risk differs from related policies
Builders risk gets confused with four other coverages on a regular basis. Here are the cleanest distinctions.
| Policy | What it covers | When you need it |
| Builders risk | The building and materials during construction | Anytime a building is being built or renovated |
| General liability (GL) | Bodily injury and property damage to third parties | Anytime work is being performed, regardless of project type |
| Homeowners (HO-3) | Existing residential structure, contents, and liability | After the home is built and occupied |
| Commercial property | Existing commercial structure and contents | After the project is complete and the building is in use |
| Installation floater | Materials and equipment being installed (not the structure itself) | Subcontractor scope where the trade is installing equipment into a building |
Builders risk picks up where the homeowners or commercial property policy stops. The HO-3 form has a dwelling-under-construction extension that is meaningful only for very small projects, typically additions under $50,000. Beyond that, the homeowners carrier expects builders risk to cover the project. Most carriers will narrow or void coverage on the existing home if a major renovation is underway without builders risk in place, which is why our homeowners insurance gap explainer is one of the most-read pages on this site. The Insurance Information Institute keeps a useful consumer-level summary if you want a second source.
General liability is the other policy contractors confuse with builders risk. The two cover different things. GL covers third-party injury and damage caused by the contractor’s operations. Builders risk covers the building itself. A lender requiring builders risk wants the building covered, not the people on it. A GC carrying $1M/$2M in GL still needs a separate builders risk policy on each project. Our builders risk vs general liability split walks through the contract language that drives both requirements.
Installation floaters are a narrower cousin. They cover materials and equipment being installed by a specific subcontractor, like an HVAC contractor’s units in transit and during installation. They cover the equipment only. Builders risk covers the surrounding building.
When coverage starts and ends
The trigger date is one of the most important details in a builders risk policy. Coverage that starts a day too late can leave a fire loss uncovered. Coverage that ends a day too early can leave the building exposed during the occupancy transition. Both happen. Both are avoidable.
Most policies begin on one of three trigger events: the policy effective date, the date materials first arrive on site, or the date the construction contract is signed. Carriers vary on which event applies, and some policies use the earliest of the three. Confirm the trigger language in writing before the project starts.
The end date is more nuanced. Standard policy language terminates coverage on the earliest of: the policy expiration date, the date the building is occupied for its intended use, the date the building is put to its intended use (which can land before full occupancy), or the date the policy is canceled by the insured.
“Occupancy” is where claims get denied. A homeowner moving furniture into a finished room before the certificate of occupancy issues can trigger early termination on some policy forms. A commercial property accepting its first tenant in one wing while the rest of the building is still under construction creates a partial occupancy issue that needs an endorsement. Carriers offer “permission to occupy” endorsements for 30, 60, or 90 days that explicitly preserve coverage during the move-in window. Request these endorsements before substantial completion. Carriers add them on request, not by default.
Projects that run long are another common termination issue. If a 12-month policy was issued for a project that takes 16 months, the policy needs to be extended by endorsement. Carriers typically allow extensions but charge prorated additional premium and sometimes re-underwrite. Extending an existing policy beats letting it expire and re-binding fresh. Re-binds usually cost more.
Common builders risk policy structures
Builders risk is sold in three main structures, and the right one depends on the contractor’s project mix.
Single-project policies are the most common. One policy covers one project, with a defined limit, term, and project address. This is what most homeowners, owner-builders, and small contractors buy. Premiums are based on the total completed value of the specific project. A $400K home addition might run $1,200 to $2,500 in premium for a 12-month term, depending on construction type, location, and carrier. Project-specific cost ranges live on our Project-specific cost ranges.
Annual blanket policies cover all of a contractor’s projects under one master policy. These are sold to general contractors and remodelers running 5 to 50 active projects at a time. The contractor reports new projects to the carrier on a monthly or quarterly schedule, and premium is calculated against estimated annual project values with a year-end audit. Blanket policies are cheaper to manage than single-project policies once a contractor has more than 5 to 10 simultaneous projects, though they require accurate reporting and can produce surprise audit premiums when reported values run low.
Master programs and reporting forms fit large commercial GCs, custom builders, and modular manufacturers. These are blanket policies with detailed project-by-project reporting and dedicated underwriting. Most master programs sit in the wholesale and surplus lines markets and fit contractors with $5M+ in annual project value, not smaller shops.
A fourth structure worth knowing about is the owner-controlled program, where a property developer carries one master builders risk policy that covers all the GCs and subs on a single large project. These are most common on multi-family and mixed-use developments above $20M.
Choosing a builders risk policy
Six factors matter when comparing builders risk policies. The weights vary.
Coverage form is the first filter. Open perils forms cover anything outside the listed exclusions. Named perils forms cover only what is listed. Open perils wins for most projects, and the price difference is usually small enough that paying up makes sense.
Exclusions are where policies separate. Common exclusions include earthquake, flood, wind in coastal zones, named storm, theft of materials before they are attached to the building, and faulty workmanship. Each can be bought back through endorsement, but the buy-back terms vary widely between carriers. A homeowner in coastal Texas needs a wind buy-back. A contractor in California needs an earthquake buy-back. A flipper renovating a vacant home needs to read the vacancy clause carefully.
Endorsements available is the next filter. The most-requested endorsements are soft costs (interest, taxes, lost rental income from a delay), debris removal, scaffolding and temporary structures, materials in transit, ordinance and law, and pollutant cleanup. Our endorsements page walks through which endorsements matter on which projects.
Carrier financial strength matters more than most contractors realize. Builders risk claims can be substantial, and a carrier with thin reserves can drag out payments. Look for carriers rated A- or better by AM Best. The carriers we shop are all admitted or accredited surplus lines carriers with A- or higher ratings.
Claims handling reputation varies more between carriers than between brokers. Ask about the average time from first notice of loss to first payment on a builders risk claim. Ask whether the carrier has a dedicated builders risk claims unit. The answers separate the carriers that specialize in this product from the ones that treat it as a sideline.
Certificate issuance speed is the most underrated factor. Construction loan draws often hinge on a compliant certificate, and a 24-hour delay can shift a closing date. Carriers that issue certificates electronically and within 4 business hours run circles around carriers that take 3 to 5 business days. We weight this heavily when matching contractors to markets.
A note on owner-builder policies: standard markets often decline owner-builder submissions because the buyer is acting as their own contractor, and the project is more likely to involve trade-quality issues. Surplus lines markets fill the gap. Our owner-builder builders risk page covers the typical pricing and underwriting story.
Frequently asked questions
Is course of construction insurance the same as builders risk?
Yes. They are two names for the same product, used the same way by carriers, lenders, brokers, and contractors. The policy form, the perils covered, and the underwriting line up the same way. A policy labeled “course of construction” satisfies a contract requirement for “builders risk” and the reverse.
What does COC mean in insurance?
COC stands for course of construction, which is another name for builders risk insurance. The abbreviation appears most often in commercial lender documents, surplus lines binders, and California regulatory filings. If a lender’s certificate request asks for “COC coverage,” they are asking for builders risk.
Do I need course of construction insurance in California?
If you are building or renovating a structure in California and the construction contract or your lender requires it, yes. California is one of the largest builders risk markets in the country, and “course of construction” is the dominant local term. Most California lenders and AIA-style construction contracts require it on projects above $50,000 in total construction value.
Does builders risk cover the contractor’s tools?
Tools sit outside the standard form. Builders risk covers the building and the materials being installed into it. Tools, scaffolding, and contractor-owned equipment travel under a separate inland marine policy or contractor’s equipment floater. Some builders risk policies offer a small sub-limit for tools through endorsement, though the coverage is usually too narrow to lean on.
How long does builders risk insurance last?
The policy term matches the expected construction duration. Small renovations run 3 to 6 months. New custom homes typically run 12 months. Large commercial projects run 24 to 36 months. If the project runs long, the policy can be extended by endorsement, though the carrier may charge prorated premium and re-underwrite.
Is builders risk the same as general liability?
They cover different things. Builders risk covers the building under construction. General liability covers third-party bodily injury and property damage caused by the contractor’s operations. Most construction contracts require both, and they are sold as separate policies. A GC carrying $1M/$2M in general liability still needs a separate builders risk policy on each project.
BuildersRiskNerd is a brand of ContractorNerd Insurance Services, LLC, a licensed insurance producer (CA License #6015566). All insurance products and services are offered through ContractorNerd Insurance Services, LLC. We are a broker, not an insurer. Policies are placed with admitted and non-admitted carriers.